Personally, I am more comfortable concealed. The gun is easily taken from a holster by someone sneaking up behind you if they can see it. Pickpockets can steal a wallet out of a jacket pocket without you knowing it. Just my personal preference. Especially in a mall or crowded space. Live in Tx, have a license.
Well, that type of criminal is looking for a quick out anyway...not exactly likely though. Anyone of minimal intelligence would place himself out of distance of anyone he knew was carrying when attempting to commit a crime. Understand your thought process, but almost sure that it is NOT what a criminal would think...(unless desperate needing a quick crack fix)...and even then unlikely.
Tactically, I prefer and recommend concealment. However, I frequently "do my thing" with my empty P7 holster openly displayed on my belt (and with a well-concealed backup). If anyone comments, I say,
"I didn't feel like covering up, but, out of courtesy, I secured my piece elsewhere. Don't let a little hunk of leather bother you..."
That gets across the point that I know and exercise my rights -- responsibly -- and helps get others used to the idea...
I accept no infringement on my Second Amendment rights. I consider the holster display to be "Civil Defiance", rather than outright "Civil Disobedience" as a protest of the current unreasonable infringement.